Re: Configuring Shared Buffers

Updates = delete / insert
inserts only create dead tuples if they fail.

So, assuming no failed inserts, you're creating 55k dead tuples a day.
You can run vacuum verbose to get a report on how many dead tuples
your tables / database has to get an idea if you're vacuuming often
enough.

If vacuuming makes the machine too slow look at setting
vacuum_cost_delay = 10 and see if that helps. Vacuums will take
longer but won't be as intrusive.

On Mon, Jun 30, 2008 at 6:12 PM, Rafael Domiciano
<rafael(dot)domiciano(at)gmail(dot)com> wrote:
> No, but is more common Insert and Update than delete.
> While I have around 50.000 Insert and Update, in delete is 5.000
>
> 2008/6/30 Alvaro Herrera <alvherre(at)commandprompt(dot)com>:
>>
>> Rafael Domiciano escribió:
>> > I have schedelus to run vacuum at the night, it starts at 01:00 AM
>>
>> Do you execute lots of updates or deletes on some tables?
>>
>> --
>> Alvaro Herrera
>> http://www.CommandPrompt.com/
>> PostgreSQL Replication, Consulting, Custom Development, 24x7 support
>
>